CN219458757U - Stator component and drainage pump with same - Google Patents

Abstract

The utility model discloses a stator component and a drainage pump with the same, comprising a stator core body, a first injection molding body and a second injection molding body, wherein the stator core body comprises an inner contour surface, the first injection molding body covers part of the stator core body, the first injection molding body comprises a radial positioning part, the radial positioning part protrudes out of the inner contour surface along the radial direction of the stator core body, and the second injection molding body covers the inner contour surface. The present application can improve the corrosion resistance of stator components.

Description

Stator component and drainage pump with same

Technical Field

The utility model relates to the technical field of electricity, in particular to a stator component and a drainage pump with the stator component.

Background

Fig. 1 is a schematic structural diagram of a stator component (before plastic packaging) in the background art.

As shown in fig. 1, the stator part 01 includes a stator core 02, the stator core 02 has an inner circumferential surface 021, and when the stator part 01 is molded, the stator part 01 needs to be positioned with a mold. The stator part 01 is radially positioned mainly by the contact of the inner circumferential surface 021 with the mold. In this way, the contact portion between the stator core 02 and the mold cannot be sealed by plastic, and the corrosion resistance of the stator core 02 is affected.

In view of this, it is a matter of consideration for those skilled in the art how to make improvements in the structure of stator components in the background art, thereby improving the corrosion resistance of the stator components.

Disclosure of Invention

In order to solve the technical problem, the application provides a stator component, including stator core, first injection molding body and second injection molding body, the stator core includes interior profile surface, first injection molding body cladding portion the stator core, first injection molding body includes radial location portion, follows the radial of stator core, radial location portion protrusion in interior profile surface, the second injection molding body covers interior profile surface.

The stator part that this application provided, the first injection molding is including protruding in the radial positioning portion of the interior profile face of stator core, and the second injection molding covers interior profile face, and this application can improve stator part's corrosion resistance.

Secondly, this application still provides a drain pump including above-mentioned stator part and having above-mentioned beneficial effect, and the drain pump still includes the pump body, impeller and rotor subassembly, the impeller is located the pump chamber of the pump body, rotor subassembly includes rotor and pivot, the rotor with pivot fixed connection, the pivot with impeller fixed connection, stator subassembly with pump body fixed connection, the rotor can for stator core rotates.

Drawings

Fig. 1: a schematic structural diagram of a stator component (before plastic packaging) in the background art;

fig. 2: a cross-sectional schematic diagram of a drain pump provided herein;

fig. 3: fig. 2 is a perspective view of a stator component;

fig. 4: fig. 3 is a perspective view of a stator core;

fig. 5: the stator part (excluding the second injection-molded body) in fig. 3 is schematically shown in structure;

fig. 6: FIG. 5 is an enlarged schematic view of a portion of a stator assembly;

fig. 7a: FIG. 5 is a top view of the stator component mated with the mold;

fig. 7b: an enlarged schematic view at I in fig. 7 a;

fig. 8: an enlarged schematic view at a in fig. 2;

fig. 9: the stator component manufacturing flow diagram of fig. 2.

The correspondence between the reference numerals and the component names in fig. 2 to 9 is:

100-stator parts, 10-accommodation cavities;

200-rotor parts, 201-rotors and 202-rotating shafts;

300-pump body, 3000-pump cavity;

400-impeller, 500-fastener;

1-stator core, 11-inner arc part;

111-inner contour surface, 12-inner cavity;

110-gap, 112-outer wall surface;

2-a first injection molding body, 21-a radial positioning part;

211-radial positioning surfaces, 212-chamfer surfaces;

22-arch plate part, 23-clamping part;

231-an axial locating surface;

3-a second injection molding body, 30-mounting holes;

31-inner wall surface, 32-limit surface;

4-enamelled wire;

5-mold, 51-wall surface;

600-end cap component;

61-a support, 611-a first cylindrical portion;

62-end cover, 621-second cylindrical portion;

a-core assembly.

Detailed Description

The present utility model will be described in further detail below with reference to the drawings and detailed description for the purpose of enabling those skilled in the art to better understand the technical solutions of the present utility model. It is evident that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. The terms upper, lower, etc. are used herein to define the relative positions of the components shown in fig. 2, and are used merely for clarity and convenience in describing the technical solution, it should be understood that the terms upper, lower, etc. should not be construed as limiting the scope of the present application.

FIG. 2 is a schematic cross-sectional view of a drain pump provided herein; FIG. 3 is a perspective view of the stator assembly of FIG. 2; FIG. 4 is a perspective view of the stator core of FIG. 3; FIG. 5 is a schematic view of the stator component of FIG. 3 (excluding the second injection molded body); FIG. 6 is an enlarged partial schematic view of the stator assembly of FIG. 5; FIG. 7a is a top view of the stator component of FIG. 5 mated with a mold; fig. 7b is an enlarged schematic view at I in fig. 7 a.

Referring to fig. 3, 4, 5, 6, 7a and 7b, the stator component 100 of the present embodiment includes a stator core 1, a first injection molding body 2, a second injection molding body 3 and an enamel wire 4, wherein the first injection molding body 2 and the second injection molding body 3 are made of different materials, the first injection molding body 2 is used for insulating the stator core 1 and the enamel wire 4, and the second injection molding body 3 is used for integrally molding the stator core 1, so as to improve the corrosion resistance of the stator core. The stator core 1 is formed by stacking magnetic steel sheets and comprises an inner contour surface 111, wherein the inner contour surface 111 is in a non-connected arc shape. The first injection molding body 2 is made of plastic, and the first injection molding body 2 is used for coating part of the stator core body 1 and isolating the stator core body 1 from the enameled wire 4 through injection molding. In this embodiment, the first injection molding body 2 includes a radial positioning portion 21, the radial positioning portion 21 protrudes from the inner contour surface 111 of the stator core 1 along the radial direction of the stator core 1, and the second injection molding body 3 covers the inner contour surface 111 of the stator core 1.

Specifically, the radial positioning portion 21 includes a radial positioning surface 211, the radial positioning surface 211 is located inside the inner contour surface 111 in the radial direction of the stator core 1, and the radial positioning surface 211 is provided to extend in the axial direction of the stator core 1. When the second injection molding body 3 is injection molded, the radial positioning surface 211 is attached to the wall surface 51 of the outer mold 5 to realize the limit fit therebetween. After the limit fit, a receiving cavity 10 is provided between the inner contour surface 111 and the mold 5, and the second injection molding body 3 fills the receiving cavity 10. After the second injection molded body 3 is molded, the second injection molded body 3 includes an inner wall surface 31 covering the inner contour surface 111, the inner wall surface 31 extending in the axial direction of the stator core 1 and defining a surface perpendicular to the axial direction of the stator core 1 as a reference projection surface, and a projection contour of the inner wall surface 31 on the reference projection surface covers a projection contour of at least part of the radial positioning surface 211 on the reference projection surface.

In this application, through set up the radial location portion 21 of protrusion in the interior profile face 111 of stator core 1 on first injection molding body 2, this radial location portion 21 is used for spacing cooperation with mould 5, so can make to have between the wall face 51 of interior profile face 111 and mould 5 and hold chamber 10, hold chamber 10 and be the annular in general, hold chamber 10 and encircle mould 5, this hold chamber 10 and be used for filling second injection molding body 3, the interior profile face 111 can be covered to the interior wall face 31 of second injection molding body 3, the projection profile of interior wall face 31 at the reference projection face covers the projection profile of at least part radial location face 211 at the reference projection face. This can improve the quality of the injection-molded second injection-molded body 3 of the stator part, i.e. the corrosion resistance of the stator part.

The first injection molded body 2 specifically includes a dome plate portion 22 and a clamping portion 23 protruding radially inward toward the stator core 1, the clamping portion 23 supporting the stator core 1 in the axial direction of the stator core 1, and a portion of the clamping portion 23 protruding inward from the inner contour surface 111 is integrally formed as the above-mentioned radial positioning portion 21, that is, the radial positioning portion 21, in the clamping portion 23. So arranged, the clamping portion 23 is capable of axially supporting the stator core 1 on the one hand and comprises on the other hand a radial positioning portion 21 in positioning engagement with the outer mould tool 5, one piece for two purposes. In addition, the radial positioning portion 21 can be integrally formed when the first injection molding body 2 is injection molded, and the processing is simple and convenient.

As shown in fig. 4 and 5, the stator core 1 includes a plurality of inner arcuate portions 11, and an inner wall surface of the inner arcuate portions 11 serves as an inner contour surface 111, and the arcuate plate portions 22 cover an outer wall surface 112 of the inner arcuate portions 11. In this embodiment, there are at least three inner circular arc portions 11, and gaps 110 are provided between adjacent inner circular arc portions 11. The radial positioning parts 21 have at least three radial positioning parts 21, and the radial positioning parts 21 are distributed at intervals along the circumferential direction of the stator core 1, so that the stator component 100 is positioned with the mold 5 more reliably before the second injection molding body 3 is injected (refer to fig. 5, 7a and 7 b). Further, the radial positioning portion 21 is located on the side of the dome plate portion 22 near the gap 110.

As shown in fig. 5 and 6, the radial positioning portion 21 is located below the inner circular arc portion 11 along the axial direction of the stator core 1, the clamping portion 23 further includes an axial positioning portion 231, and the axial positioning portion 231 is located below the inner circular arc portion 11, that is, the radial positioning portion 21 and the axial positioning portion 231 are located on the same side of the stator core 1 along the axial direction of the stator core 1, and the axial positioning portion 231 can be in a limit fit with the mold 5. Specifically, the stator part 100 before injection molding the second injection molded body 3 is placed in the cavity of the mold 5, and is positioned in contact with the ejector pins (not shown) of the mold 5 in the axial direction by the axial positioning portions 231. By the arrangement, the plastic packaging quality of the stator part can be improved, namely the corrosion resistance of the stator part is improved. In addition, the radial positioning portion 21 and the axial positioning portion 231 are staggered along the circumferential direction of the stator core 1, so that the radial positioning portion 21 and the axial positioning portion 231 do not interfere with each other, and the reliability of matching with the mold 5 is improved.

In this embodiment, the clamping portion 23 further includes an axial positioning portion 231, and the clamping portion 23 has a radial positioning function and an axial positioning function in addition to the clamping function, so that the radial positioning portion 21 and the axial positioning portion 231 can be integrally formed during injection molding of the first injection molding body 2, thereby solving the problem of positioning the stator component 100 in the radial and axial directions with the mold 5 during injection molding of the second injection molding body 3, and having simple structure and convenient processing.

Further, as shown in fig. 6, the radial positioning portion 21 further includes a chamfer 212, and the chamfer 212 is located below the radial positioning surface 211 in the axial direction of the stator core 1, and the chamfer 212 is connected to the radial positioning surface 211. By providing the chamfer 212, the stator part 100 before injection molding the second injection molding body 3 can be guided to the mold 5 when being put into the cavity of the mold 5, and both can be assembled conveniently.

Further, as shown in fig. 7b, defining the distance D between the radial positioning surface 211 and the inner contour surface 111 along the radial direction of the stator core 1, it is satisfied that: d is more than 0.1mm and less than 0.4mm. When D is less than or equal to 0.1mm, the thickness of the second injection molding body 3 at the inner contour surface 111 is too thin, so that the bonding strength of the second injection molding body 3 and the stator core body 1 is influenced, and the corrosion resistance of the stator part is influenced; when D is not less than 0.4mm, the thickness of the second injection molded body 3 at the inner contour surface 111 is too thick, and the influence on the electrical performance between the rotor 201 and the stator core 1 is too large, mainly the excitation loss increases. Therefore, when 0.1mm < D < 0.4mm, not only the bonding strength of the second injection-molded body 3 and the stator core 1 can be ensured, thereby ensuring the corrosion resistance of the stator component, but also the excitation loss between the rotor 201 and the stator core 1 can be reduced.

In addition, the second injection-molded body 3 is specifically a thermosetting material, and nylon material is used in this embodiment. The melting point of the material of the first injection molding body 2 is higher than the molding temperature of the material of the second injection molding body, and in this embodiment, the first injection molding body 2 is made of BMC material. This ensures that the structural stability of the first injection-molded body 2 is not affected when the second injection-molded body 3 is injection-molded.

It should be noted that, in the above embodiment, no matter what shape or structure the radial positioning portion takes, it should be within the protection scope of the present utility model as long as it can be in limit fit with the mold in the radial direction of the stator core.

Further, as shown in fig. 2, the present application also provides a drain pump including a pump body 300, an impeller 400, and a rotor member 200, the pump body 300 including a pump chamber 3000, the impeller 400 being located in the pump chamber 3000. The rotor part 200 includes a rotor 201 and a rotating shaft 202, the rotor 201 is fixedly connected with the rotating shaft 202, and the rotating shaft 202 is fixedly connected with the impeller 400. The drain pump further comprises the stator component 100 in the technical scheme, the stator component 100 is fixedly connected with the pump body 300, the stator core 1 of the stator component 100 is matched with the rotor 201, and the rotor 201 can rotate relative to the stator core 1. It should be noted that the drain pump is not limited to use in an air conditioner, and it can be understood that the drain pump provided in the present application can be used in any situation where drainage is required.

Further, as shown in fig. 2 and 3, the second injection molding body 3 of the stator component 100 includes a mounting hole 30, the mounting hole 30 is located at the radial outer side of the stator core 1, the drainage pump further includes a fastener 500, the fastener 500 penetrates through the mounting hole 30, and the stator component 100 and the pump body 300 are fixedly connected by the fastener 500, in this embodiment, the fastener 500 is specifically a screw.

Fig. 8 is an enlarged schematic view at a in fig. 2.

As shown in fig. 3 and 8, the stator member 100 includes an inner cavity 12, and the rotor 201 is positioned in the inner cavity 12. The drain pump further includes an end cover member 600, the end cover member 600 including a support 61 and an end cover 62, the support 61 and the end cover 62 being respectively punched from a metal plate. The support 61 includes a first cylindrical portion 611 extending in the axial direction of the rotor member 200, the first cylindrical portion 611 being at least partially located in the inner chamber 12, the wall forming the inner chamber 12 including the stopper surface 32 and the above-described inner wall surface 31, the stopper surface 32 being further from the rotor 201 than the inner wall surface 31 in the radial direction of the rotor member 200, and an outer peripheral wall of the first cylindrical portion 611 being at least partially fitted with the stopper surface 32. The end cover 62 includes a second cylindrical portion 621 extending in the axial direction of the rotor member 200, the second cylindrical portion 621 being at least partially located in the inner cavity 12, an outer peripheral wall of the second cylindrical portion 621 being at least partially in close fit with an inner peripheral wall of the first cylindrical portion 611. By partially inserting the end cap member 600 into the inner cavity 12 and fitting the outer peripheral wall of the first cylindrical portion 611 of the support 61 with the stopper surface 32, the outer peripheral wall of the second cylindrical portion 621 of the end cap 62 is fitted with the inner peripheral wall of the first cylindrical portion 611, external moisture can be prevented from entering the inner cavity 12, and corrosion resistance of the stator member can be improved.

Fig. 9 is a flow chart of the fabrication of the stator assembly of fig. 2.

A method of manufacturing the stator assembly 100 described above is described below with reference to fig. 2-9.

The manufacturing method comprises the following steps: the stator core 1 and the enameled wire 4 are provided, the stator core 1 is used as an insert injection molding first injection molding body 2, the first injection molding body 2 forms a radial positioning part 21 protruding out of an inner contour surface 111 of the stator core 1, the enameled wire 4 is wound on the first injection molding body 2 to serve as a core assembly A, the radial positioning part 21 and the mold 5 are positioned in the radial direction of the stator core 1, and the core assembly A is used as an insert injection molding second injection molding body 3.

In this manufacturing method, the radial positioning portion 21 is molded together with the first injection molded body 2, and the second injection molded body 3 is molded after the radial positioning portion 21 is positioned with the mold 5, so that the second injection molded body 3 can be ensured to cover the inner contour surface 111 of the stator core 1, thereby improving the corrosion resistance of the stator member.

It should be noted that, the positioning of the radial positioning portion 21 and the mold 5 is preferably performed by adopting a positioning manner of bonding, that is, the radial positioning surface 211 is bonded to the wall surface 51 of the mold 5 to perform limiting, so that the matching accuracy of the two can be improved, the thickness uniformity of the inner wall surface 31 covering the inner contour surface 111 can be ensured, and the electrical performance of the stator core 1 and the rotor 201 is improved.

Further, after the first injection molding body 2 is injection molded, the first injection molding body 2 further forms an axial positioning portion 231, positions the radial positioning portion 21 and the mold 5 in the radial direction of the stator core 1, and simultaneously positions the axial positioning portion 231 and the mold 5 in the axial direction of the stator core 1, and the second injection molding body 3 is injection molded by taking the core assembly a as an insert.

Before the second injection molded body 3 is injection molded, the radial positioning portion 21, the axial positioning portion 231 and the mold 5 are positioned, so that the injection molding quality of the second injection molded body 3 can be improved, and the corrosion resistance of the stator component can be improved.

The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.

Claims (11)

1. The stator component is characterized by comprising a stator core body, a first injection molding body and a second injection molding body, wherein the stator core body comprises an inner contour surface, a first injection molding body coating part is used for coating the stator core body, the first injection molding body comprises a radial positioning part, the radial positioning part protrudes out of the inner contour surface along the radial direction of the stator core body, and the second injection molding body covers the inner contour surface.

2. The stator component of claim 1, wherein the radial positioning portion includes a radial positioning surface that extends in an axial direction of the stator core, the second injection molded body includes an inner wall surface that covers the inner contour surface, the inner wall surface extends in the axial direction of the stator core, a surface perpendicular to the axial direction of the stator core is defined as a reference projection surface, and a projection profile of the inner wall surface on the reference projection surface covers a projection profile of at least a portion of the radial positioning surface on the reference projection surface.

3. The stator component of claim 1, wherein the first injection molded body includes a dome plate portion and a clip portion protruding radially inward from the dome plate portion toward the stator core, the clip portion supporting the stator core in an axial direction of the stator core, a portion of the clip portion protruding inward from the inner contour surface serving as the radial positioning portion.

4. A stator component according to claim 3, wherein the stator core includes a plurality of inner arcuate portions, an inner wall surface of the inner arcuate portions serving as the inner contour surface, the clamping portions supporting the inner arcuate portions in an axial direction of the stator core, the arcuate plate portions covering an outer wall surface of the inner arcuate portions with a gap therebetween, and the radial positioning portions being located on a side of the arcuate plate portions adjacent to the gap.

5. The stator component of claim 4, wherein the radial positioning portions are located below the inner circular arc portion, the radial positioning portions are at least three, the radial positioning portions are distributed along the circumferential direction of the stator core, the clamping portion further comprises axial positioning portions, the axial positioning portions are located below the inner circular arc portion, and the radial positioning portions and the axial positioning portions are staggered along the circumferential direction of the stator core.

6. The stator component of claim 2 wherein the radial positioning portion further comprises a chamfer surface located on an underside of the radial positioning surface, the chamfer surface being connected to the radial positioning surface.

7. The stator component of claim 2, wherein a radial direction of the stator core is defined, the radial locating surface being a distance D from the inner contoured surface, then: d is more than 0.1mm and less than 0.4mm.

8. The stator component of any one of claims 1 to 7 wherein the material of the second injection molded body is a thermoset material and the material of the first injection molded body has a melting point that is higher than the molding temperature of the material of the second injection molded body.

9. A drain pump comprising a pump body, an impeller and a rotor component, wherein the impeller is located in a pump cavity of the pump body, the rotor component comprises a rotor and a rotating shaft, the rotor is fixedly connected with the rotating shaft, and the rotating shaft is fixedly connected with the impeller.

10. The drain pump of claim 9, wherein the second injection molded body includes a mounting hole located radially outward of the stator core, the drain pump further including a fastener extending through the mounting hole, the stator component being fixedly coupled to the pump body by the fastener.

11. The drain pump of claim 9, wherein the stator component includes an inner cavity in which the rotor is located, the drain pump further including an end cap component including a support and an end cap, the support including a cylindrical portion extending in an axial direction of the rotor component, the cylindrical portion being at least partially located in the inner cavity, the second injection molded body further including a stopper surface located farther from the rotor than the inner wall surface in a radial direction of the rotor component, an outer peripheral wall of the cylindrical portion being at least partially in close fit with the stopper surface, the end cap including a downward extending portion extending in the axial direction of the rotor component, the downward extending portion being at least partially in close fit with an inner peripheral wall of the cylindrical portion.